منابع مشابه
Dark Matter in Cosmology
The last two decades in cosmological research have been an exciting time, and produced an exciting product: we now have in hand a “standard model” of cosmology. While several aspects of this model remain mysterious, its predictions are in remarkable accord with a vast range of observational data. A key aspect of this model, and one of the aforementioned mysteries, is the dark matter: a cold, co...
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1 Historical Summary Cosmological dark matter in the form of neutrinos with masses of up to a few electron volts is known as hot dark matter. In 1979-83, this appeared to be perhaps the most plausible dark matter candidate. Such HDM models of cosmological structure formation led to a top-down formation scenario, in which superclusters of galaxies are the first objects to form, with galaxies and...
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Bruce A. Bassett, Martin Kunz, David Parkinson and Carlo Ungarelli Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 2EG, UK Astrophysics, Department of Physics, 1 Keble Road, Oxford University, Oxford OX1 3RH, UK Astronomy Centre, CPES, University of Sussex, Brighton, BN1 9QJ, UK School of Physics and Astronomy, University of Birmingham Edgbaston, Birmingham, B15...
متن کاملDark Matter in Models of String Cosmology
The origin of dark matter in the universe may be weakly interacting scalar particles produced by amplification of quantum fluctuations during a period of dilaton-driven inflation. We present two interesting cases, the case of small fluctuations, and the resulting nonthermal spectrum, and the case of large fluctuations of a field with a periodic potential, the QCD axion. We consider particle pro...
متن کاملDark matter in axino-gravitino cosmology.
It is suggested that the axino mass in the 1 MeV region and gravitino mass in the eV region can provide an axino lifetime of order of the time of photon decoupling. In this case, some undecayed axinos act like cold dark matters and some axino decay products (gravitinos and hot axions) act like hot dark matters at the time of galaxy formation. The cosmological constant problem and the dark matte...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2019
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2019/04/014